Year
.
1969
2 600
1 791
1970
1 500
1 168
1971
1 700
1 713
1972
1 000
1 243
1973
6 000
3 900
1974
4 800
4 936
1975
7 330
2 976
1976
4 900a
3 200
1977
3 000
2 900
1978
3 300
3 600
a Includes $900 000 for the transition quarter.